使用tty命令获取当前终端名称，将日志输出到当前终端

shm_consumer/MESA_shm_consumer.c

@@ -24,6 +24,8 @@
 #define CONSUMER_CARE_PID_SPEC          1
 #define CONSUMER_CARE_PID_MAX_LEN       128
 
+int g_cur_tty_fd = -1;
+
 struct log_file_list{
 	char log_file_pre[MESA_SHM_LOG_PATH_LEN];
 	char real_log_file[MESA_SHM_LOG_PATH_LEN];
@@ -294,7 +296,9 @@ void consumer_ring_queue_to_terminal(struct MESA_shm_queue_head *head, int produ
 		payload_len = *p_payload_len;
 		payload = (char *)(p_payload_len + 1);
 		n = snprintf(buf, sizeof(buf), "pid:%d, %s\n", producer_pid, payload);
-		write(STDOUT_FILENO, buf, n);
+		if(g_cur_tty_fd > 0){
+			write(g_cur_tty_fd, buf, n);
+		}
 		head->rd_idx = (head->rd_idx + 1) % head->blknum;
 	}
 	return ;
@@ -482,7 +486,41 @@ void kill_old_process(char *process_name)
 	pclose(fp);
 	return ;	
 }
-
+int get_cur_tty_fd()
+{
+	FILE *fp = NULL;
+	char cur_tty_name[DEFAUT_BUF_SIZE] = {0};
+	char command[DEFAUT_BUF_SIZE] = {0};
+	char *p = NULL;
+	int cur_tty_fd = -1;
+	snprintf(command, sizeof(command), "tty");
+	fp = popen(command, "r");
+	if(fp == NULL){
+		return -1;
+	}
+	if((fgets(cur_tty_name, sizeof(cur_tty_name), fp)) != NULL){
+		if(strncmp(cur_tty_name, "/dev/pts/", strlen("/dev/pts/")) != 0){
+			goto error;
+		}
+		p = strchr(cur_tty_name, '\n');
+		if(p == NULL){
+			goto error;
+		}
+		*p = '\0';
+		cur_tty_fd = open(cur_tty_name, O_WRONLY);
+		if(cur_tty_fd < 0){
+			goto error;
+		}
+	}else{
+		goto error;
+	}
+	pclose(fp);
+	return cur_tty_fd;
+	
+error:
+	pclose(fp);
+	return -1;	
+}
 
 void print_help(char *exe_name)
 {
@@ -510,6 +548,8 @@ int main(int argc, char **argv)
 	kill_old_process(exe_name);
 	if(g_output_mode == CONSUMER_OUTPUT_MODE_FILE){
 		consumer_daemo();
+	}else{
+		g_cur_tty_fd = get_cur_tty_fd();
 	}
 	int i = 0;
 	struct MESA_shm_overview *shm_overview = NULL;